David B. Spangler

About the Author

David B. Spangler is a seasoned educator and mathematics specialist with over three decades of experience in K-12 classrooms and professional development. Holding a master's degree in curriculum and instruction, he has dedicated his career to demystifying math for struggling learners, emphasizing practical, evidence-based strategies that empower both teachers and students. Spangler's approach bridges theory and practice, drawing from his time as a classroom teacher, intervention specialist, and consultant for school districts nationwide. His innovative methods focus on error analysis as a tool for deeper understanding, making complex concepts accessible and engaging. Through his writing and workshops, he continues to influence educators, fostering a more equitable and effective mathematics education landscape.